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The mean score of five students is 7.2. Janice was

Berikut ini adalah pertanyaan dari heeyioihv pada mata pelajaran Matematika untuk jenjang Sekolah Menengah Atas

The mean score of five students is 7.2. Janice was not join the test because she was sick on that day. But, after doing the test, the mean score of all become 6.85. What is Janice score?​Nilai
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9
Frekuensi
3
5
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10
8
4
3

Jawaban dan Penjelasan

Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.

Jawaban:

5.1

Penjelasan dengan langkah-langkah:

Let's denote Janice's score as "x".

We know that the mean score of the five students (excluding Janice) is 7.2. This means that the sum of their scores is 5 * 7.2 = 36.

After Janice takes the test, the mean score of all six students becomes 6.85. This means that the sum of all their scores is 6 * 6.85 = 41.1.

We can now set up an equation to solve for Janice's score:

(36 + x) / 6 = 6.85

Multiplying both sides by 6, we get:

36 + x = 41.1

Subtracting 36 from both sides, we get:

x = 5.1

Therefore, Janice's score is 5.1.

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Last Update: Wed, 05 Jul 23
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